SY89827L

Micrel, Inc. NOT RECOMMENDED FOR NEW DESIGNS 3.3V 500MHz DUAL 1:10 HSTL FANOUT Precision Edge® Precision ESdYg89e8®27L BUFFER/TRANSLATOR WITH 2:1 MUX INPUT SY89827L FEATURES ■ Dual LVPECL or HSTL input, 10 differential 1.5V HSTL compatible outputs ■ Configurable as dual-channel 10 output or a singlechannel 20 output clock driver ■ Guaranteed AC parameters over temperature and voltage: > 500MHz fMAX < 50ps within device skew < 1.5ns propagation delay < 700ps tr / tf time ■ Low jitter design 186fsRMS phase jitter ■ 3.3V core supply, 1.8V output supply ■ Output enable function ■ Available in a 64-Pin EPAD-TQFP APPLICATIONS ■ High-performance PCs ■ Workstations ■ Parallel processor-based systems ■ Other high-performance computing ■ Communications DESCRIPTION Precision Edge® The SY89827L is a High Performance Bus Clock Driver with dual 1:10 or single 1:20 HSTL (High Speed Transceiver Logic) output pairs. The part is designed for use in low voltage (3.3V/1.8V) applications which require a large number of outputs to drive precisely aligned, ultra low skew signals to their destination. The input is multiplexed from either HSTL or LVPECL (Low Voltage Positive Emitter Coupled Logic) by the CLK_SEL pin. The Output Enables (OE1 & OE2) are synchronous so that the outputs will only be enabled/disabled when they are already in the LOW state. This avoids any chance of generating a runt clock pulse when the device is enabled/disabled as can happen with an asynchronous contro...